ATX MINI TOWER

I might need a new case cuz of reasons and I'd like a smaller one than what I currently have (43x21x47cm). I use: ASUS prime B250M-K micro atx Gigabyte Radeon HD 7870 (28 cm) Corsair Vengeance LPX 2x4 DDR4 500W PSU Intel Pentium G4560 3.5GHz Zalman's CNPS9500 LED CPU cooler Crucial BX500...

recently, my pc has been acting funny. i was using it one day. i got off of it and went bed. i got up in the morning and tried to use it and my monitor kept saying no signal. i unplugged the vga cable and plugged it back in. nothing. i have currently tried everything i can. ive taken it apart...